🌊 Oura: $0 to $1B Revenue in 10 Years

The 9 growth levers behind the $11B smart ring

Ivan Landabaso

Jul 28, 2026

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👋 I’m Ivan. I study how top 1% startups grow. Over 24,000 subscribers turn to us for startup growth deep-dives.

From sleep tracker → the S-1 pile

A little about how this market evolved before we get to the growth mechanics:

Where we come from

The First Fitbit: How the Fitness Tracker Was Engineered - IEEE Spectrum — First generation Fitbit trackers shipped in 2009

Wearables grew up on the wrist with Fitbit putting a step counter there in 2007, the Apple Watch arriving in 2015, and for a decade or so the category meant mainly a screen on your arm “counting” your activity.

The wrist won by default (the watch form-factor was already there) for the same reason that when you go to a hospital they clip the sensor to your finger, because the arteries sit close to the surface there and the signal is clean. And sleep (most information-dense 8 hours of your physiology, and the absolute 80/20 to fix / step 0 to get anything health-wise done), went mostly unmeasured.

Where we are

Roughly 164M smartwatches shipped in 2025. The ring is now its own category basically owned by Oura with an estimated 80%+ market share. And of course the pressure arrived on schedule:

Samsung → launched the Galaxy Ring at $399 with no subscription.
The low-cost clones (Ultrahuman, RingConn) → attacked on price until the ITC banned their rings from the US in October 2025.
Apple → the rumor that never dies with analysts not expecting a ring before 2028.

Oura stopped being “just” a gadget company somewhere along the way with at least half of its story now running through glucose sensors, blood panels, a Medicare Advantage sleep-apnea pathway, plus thousands of rings across the US defense sector (US Department of Defense is now its largest enterprise customer!).

Where the market is going

Lilly Makes an Equity Investment in Oura, Supporting Oura's Vision for More Connected Care - The Pulse Blog — source

The fight is shifting from tracking your body to standing between you and the healthcare system and 3 things will likely shape the next few years:

Platform owners set the price of software at zero: Samsung already did and if Apple ships a ring bundled into an iPhone upsell it’ll shake up competitive dynamics. Oura’s answer is the subscription itself (more below).
Healthcare: Oura routes sleep-apnea signals into physician referrals for Medicare members, and Eli Lilly took an equity stake this month. In Europe roughly 10% of GDP goes to healthcare, and Hale talks openly about being “a virtual doctor in your pocket” (Slush, 2025).
The IPO wave decides the multiple. Oura filed its S-1 the same week as SpaceX. Whether public markets read it as a hardware company or a subscription company is worth billions either way, and that question runs through this whole piece.

Now to Oura’s origin and the 9 levers:

Act 1: The Kickstarter Ring From Oulu

2013 → 2019 · $0 → first 150K rings

Oura was born in 2013 in Oulu, a Finnish city 2 hours below the Arctic Circle that Nokia’s collapse had filled with unemployed hardware engineers and, usefully, world-class testing labs.

“behind Nokia we found big labs with the best equipment to test the device.”

The 3 founders (Petteri Lahtela, Kari Kivelä, Markku Koskela) came out of the Polar and Nokia orbit, and Lahtela’s obsession came from years building IT systems for chronic disease management, where he watched health data reach patients years too late. The company was originally called Jouzen (from joutsen the Finnish word for swan) with the zen for calm and a deliberate phonetic nod to the English “chosen” (members have chosen to prioritize their health). Cash was so tight that salaries sometimes ran months late:

“We lived off personal credit cards, but everyone showed up to work every day, driven by the vision to bring Oura Ring to the world.” (Marjut Uusitalo, early employee, Oura’s history blog)

The 0 → 1: how the first rings actually got sold

They decided on day one that the US was the market to go after:

March 2015 → came out of stealth on stage at the San Francisco Launch Festival, where Lahtela said “we all know the charge level of our mobile phones, but do you know the charge level of your body?” Gen1’s official job was a way to collect data to validate the science and hone the algorithms.
The first believers → not easy to find. Lahtela says it was “really hard, really really hard,” until they landed on people who “spoke the same language,” first the Quantified Self crowd in San Francisco, then the biohacking and self-optimization scene. Those early users were “in resonance” with the approach so they understood what Oura was going for and according to the founders “helped us to form the product as well”.
August 2015 → the Kickstarter hit its $100K target in 15 hours and closed at $650K from ~2,400 backers with apparently no PR and no paid ads. Those 2,400 backers were the first paying customers, recruited almost entirely through the communities above plus what Lahtela calls “lots of footwork in between and after.”
Investors said no → “it was really hard to find investors who were also driven by something else other than money”. The early cap table filled up with angels instead including Will Smith, Shaquille O’Neal, YouTube’s Steve Chen and Twitch’s Kevin Lin (per Nordic Business Report, so treat as reported).

Then 2 outsiders found the company and both became levers:

2015-2017, Stanford Research Institute → secretly bought 2 rings off Kickstarter to test them (more in Growth Lever 2).
2016 a Whole Foods in New York → co-founder Kivelä spotted the first stranger he’d ever seen wearing the ring. It was Harpreet Singh Rai, a hedge fund PM who had lost ~50 pounds using it! Rai invested in September 2017, joined the board, moved to San Francisco and became CEO in 2018 (who later stepped down).

Gen2 debuted at Slush in November 2017 and sales jumped to ~10K rings then 100K+ rings across 100+ countries by August 2019, and roughly 150K total before 2020.

Now lets dive into how they grew:

Growth Lever 1: They built a wearable you never take off

“It is just there for you, you don’t need to interact with it... that is a reason why our retention rates are so high.” (Petteri Lahtela, Ali Fitness podcast, 2018)

Wearable decisions flow from 2 architectural choices they made in 2013:

Measure from the finger → arteries sit closer to the skin than at the wrist, the tissue is uniform (no hair, bone, or tattoos in the way), so the signal is cleaner and the accuracy claims get easier to defend.
Put nothing on the ring → no screen, no LEDs, no interface. You don’t feed it attention, you don’t charge it nightly (7-8 days of battery), and as Hale likes to put it, “it’s not another digital mouth to feed.”

It matters for growth because a sleep tracker only works if you wear it to sleep, every night, for years, and the device you forget you’re wearing is the device you never take off. Continuous wear → continuous data → insights that compound (illness prediction needs your baseline, cycle prediction needs months of temperature), so wearing comfort becomes the door to the data moat.

Lahtela claims retention runs 3 to 4x higher than any other wearable (Slush 2024).

Hold onto the ratio V over P (value over price) because it’s their mental model for the business and every lever below either pushes the V up or refuses to touch the P.

Growth Lever 2: They let Stanford prove their claims for them

“Without anyone at Oura knowing, SRI had purchased two rings from Kickstarter to study Oura’s performance.”

In the middle of the Kickstarter chaos the Stanford Research Institute apparently bought 2 rings and ran them against polysomnography (the gold-standard sleep lab measurement). The study, published in March 2017, found Oura the most accurate wearable for sleep staging, which made a tiny Finnish startup the first independently validated wearable on the market.

Oura then “industrialized” the accident:

A real science org → roughly 70 people including 30+ PhDs, about 7% of the company running validation across skin tones and health conditions, plus a 100,000-person blood pressure study.
A partner ecosystem doing the distribution → 800+ ecosystem partners by the end of 2024 (company-reported), 1,000+ on Sacra’s current count, universities, hospitals, and health apps that run on Oura data.
Clinical-grade as the internal bar → “we aspire to the level of accuracy and quality that would be appropriate for a medical device” (Hale, How Leaders Lead), without being regulated as one.

The growth lever here is clearly borrowing credibility (which beats bought credibility), since a peer-reviewed study converts skeptics (definitely better than ads). I liked Hale’s framing of the partner network:

“By enabling other partners they become your salespeople and your distribution channel and your referral network.” (Tom Hale, Masters of Scale 2025)

Growth Lever 3: They got 60% of sales from users recommending the ring

“The best marketing is when you create such a (good) user experience that the user reveals something of themselves that they didn’t know before... he or she wants to tell about the product to everyone.” (Petteri Lahtela, Slush 2024)

The founders’ number is that roughly 60% of all sales have come from existing users recommending the ring “and that has been the same for all the time” (Slush 2024). Hale’s version of the same number from the 2022 data is that 1 out of 4 customers showed up because someone recommended it.

The founders’ design goal was a product that produces a personal revelation (you learn you’ve been under-sleeping for 20 years, you see the exact night the wine wrecked you etc), because a “revelation” is the thing you tell your friends about.

The machinery in practice:

The product produces tellable moments → it flags you’re getting sick 2 days before you feel it, and Hale tells the story of a stranger stopping him in an airport security line to say “Oura got me pregnant” (Slush 2025).
The celebrity roster wore it without contracts → Bill Gates, Bezos, Bono, Jennifer Aniston, all organic per CMO Doug Sweeny. Oura didn’t sign its first paid ambassadors (Harry Kane, Declan Rice) until June 2026.
Prince Harry was the extreme case → he wore it on official tours in 2018-2019 and the press noticed. Oura never paid him and never met him, the contact ran through his doctor, with one message, roughly, don’t talk about my ring, talk about how this product can help young adults stay healthy.

Act 2: The Bubble, the $6 Revolt, and the Missed Target

2020 → 2022 · 150K rings → $165M revenue

In 2020 COVID made body temperature front-page news for all of us. Then suddently 2 university studies said the ring could spot symptoms days early and 65,000 users donated their data to prove it (and everyone wanted one). But it didn’t last:

Growth Lever 4: They sold to institutions in crisis, then let the endorsements sell consumers

“From the NBA to Vegas casinos, everyone’s clamoring for the $299 ring.”

Who signed in 2020: